diff --git a/bullmoose20/ppm/docker-compose.yml b/bullmoose20/ppm/docker-compose.yml
index fea9fc8..13f1108 100644
--- a/bullmoose20/ppm/docker-compose.yml
+++ b/bullmoose20/ppm/docker-compose.yml
@@ -1,3 +1,4 @@
+version: "3"
 services:
   ppm:
     hostname: "ppm"